Improved abtificial teipoli foe polishing



guilt gums simiffiem THOMA s J. P'L'A'TT, oF NEWARK, NEW JERSEY.

' Letters Patent No. 61,094, dated January 8, 1867.

IIMKEBOVED AETIHGML TRIPOLI FOE POLISHING.

flLEgc Slzlgehnlc refuse in imflgess flatten new no making out niflge mic.

iii ALL WHOM Ii MAY CONCERN:

- 'Be it known-ohm I, THOMAS J. PLATT, of Newark, county of Essex, and State of New Jersey, have invented a new and improved American Tripoli; end I do hereby declare that the following is a, full, clear, and exoct description thereof,- which will enable others skillefi in the art to make and. usethe some.

it is well known that the fine polishing material known as tr'ipoli is e mineml substance, fonnd in different I foreign countries, and that large quantities of it are annually imported into this country for the use of manufncturcrs of jewelry nod'fin'e ciilzlery, as well as for domestic'use. Until recently, all efforts to discover ozproduceon article which would successfully compete with the foreign tripoli has proved fruitless; consequently large sums ofmoney have annually left't-he country to pay for tliis article. Having been for some time eisonally interested in this article, omlnith a very thorough knowledge of what our manufacturers require in tlicirbnsiness, I have made extensive researches and experiments to discover or produce a substance which WOUlJflF-SWQT as asubstitute, and have of; length succeeded .to my entire setisfactiom- I employ a loom, which is believed iobc claysliglitly colored by the oxirleof iron, and containing quartz in the form ofi vcrj fine sand, which, when combined with. the substances hereinafter na-mecl, possesses all the valuable qualities of the best foreign tripoli. Although isis a compound, and preploreil with a great deal of care, I am able to furnish if. to consumers at a much less price than the foreign tripoli commands 'In preparing my Ameriea-n'tripoli, the

loam before mentioned, properly cleansed, forties about half of the coinpouncl; plaster of Paris, (calcincd,) one fourth; yellow ochre, one fourth. 1b is necessary to my these proportions somewhat, ico snic the different 'uses or articles io wliicli it is applied; but about the above proportion will be found to suit tiiegenernl market. But I do nofi confine myself to those paz'i-icnlar proportions. 7 I

Having thus clesorioeql my invention, whetl claim as new, and desire to secure by Letters Patent is- A polishing museriol coin gose-Si the snl smnoes herein named. and described, substantially as and for the purposes set forth, 7 V l V The above speoificriiien of my invention "signed by me this 13th clay of @ccober, 1866.

Witnesses: 7

WM. 15. McNAmnA, ALEX. F. 120mm 

